US4673375A - Friction coating for contacting elements of a constant velocity joint - Google Patents

Friction coating for contacting elements of a constant velocity joint Download PDF

Info

Publication number
US4673375A
US4673375A US06/824,568 US82456886A US4673375A US 4673375 A US4673375 A US 4673375A US 82456886 A US82456886 A US 82456886A US 4673375 A US4673375 A US 4673375A
Authority
US
United States
Prior art keywords
contact
constant velocity
joint
retainer
contact surfaces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/824,568
Other languages
English (en)
Inventor
Rune Adolfsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF Nova AB
Original Assignee
SKF Nova AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SKF Nova AB filed Critical SKF Nova AB
Assigned to SKF NOVA AB, A CORP. OF SWEDEN reassignment SKF NOVA AB, A CORP. OF SWEDEN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ADOLFSSON, RUNE
Application granted granted Critical
Publication of US4673375A publication Critical patent/US4673375A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/10—Surface characteristics; Details related to material surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S464/00—Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
    • Y10S464/904—Homokinetic coupling
    • Y10S464/906—Torque transmitted via radially spaced balls

Definitions

  • the present invention relates to improvements in constant velocity joints and particularly to a novel friction coating for at least one of the contacting elements of the assembly having a coefficient of friction considerably greater than the starting point coefficient of friction thereby to reduce the contact stresses between the contacting elements such as the rolling elements and the retainer.
  • Joints of this type are usually used for power transmission to driven or steered wheels of motor vehicles.
  • the rotational axes of the rotatable members interconnected by means of the joint shall have an ability of being angularly tilted up to about 50° in order to allow a satisfactory guiding.
  • the rolling bodies of the joint will be subjected to big, unsymmetrical forces in certain positions, when the rolling bodies contact walls in grooves crossing each other, whereby the rolling bodies will be pressed against the retainer in such a manner that friction losses and wear will appear at the contact between the rolling bodies and the retainer, where sliding will occur.
  • the purpose of the present invention is to provide a joint of the type defined in the preamble, in which friction and wear is kept at a minimum, which causes the service life to be increased and transmission losses to be reduced in relation to what is common at conventional joints of the type concerned.
  • Such a joint may have the same shape and assembly dimension as earlier known constant velocity joints and, therefore, requires no special arrangements for being used in all ordinary connections.
  • the features mentioned can be obtained in simple and inexpensive manner.
  • FIG. 1 shows a longitudinal section
  • FIG. 2 shows how the forces from the retainer and grooves in the different joint members act upon an unsymmetrically loaded rolling body
  • FIG. 3 shows a cross-section of a diagrammatical embodiment of a constant velocity joint in which the invention can be applied.
  • a constant velocity joint incorporates an inner part 1 and an outer part 2, each part being attached to a rotatable member, e.g. a drive shaft and a vehicle wheel in a motor vehicle with driven and steerable wheels.
  • the rotational axes of the interconnected members, and thereby also of the inner and outer joint parts 1, 2 together can form a variable angle, which is designed ⁇ in FIG. 1.
  • the inner part 1 is enclosed in a portion of the outer part 2.
  • the parts 1, 2 are provided with a number of grooves 3, 4, which are situated opposite each other pair by pair.
  • a rolling body 5 is arranged in each pair of grooves. The rolling bodies are guided in an annular retainer 6 and transmit torque between the joint parts 1, 2.
  • the force F 3 will be reduced if the friction coefficient ⁇ increases.
  • ⁇ reaches the value tan ⁇ /2 the force F 3 is completely eliminated.
  • a friction coefficient ⁇ of about 0.5 then will bring about that the contact force between the rolling body and the retainer will be neglectable at all conditions.
  • the friction coefficient is about 0.3 the contact force is thus almost eliminated during most conditions.
  • the contact force thus can be reduced or eliminated by increasing the friction coefficient in the contacts between the rolling body and the grooves.
  • the invention is based on this finding, and according to the invention the grooves and/or the rolling bodies are provided with surface layers which make the friction coefficient considerably higher than the friction coefficient in a corresponding contact between two steel surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Friction Gearing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Paper (AREA)
  • Nonmetallic Welding Materials (AREA)
US06/824,568 1985-02-22 1986-01-23 Friction coating for contacting elements of a constant velocity joint Expired - Fee Related US4673375A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8500869A SE446896B (sv) 1985-02-22 1985-02-22 Universalkopplingsanordning
SE8500869 1985-02-22

Publications (1)

Publication Number Publication Date
US4673375A true US4673375A (en) 1987-06-16

Family

ID=20359231

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/824,568 Expired - Fee Related US4673375A (en) 1985-02-22 1986-01-23 Friction coating for contacting elements of a constant velocity joint

Country Status (5)

Country Link
US (1) US4673375A (en])
EP (1) EP0196403B1 (en])
JP (1) JPS61192930A (en])
DE (1) DE3661378D1 (en])
SE (1) SE446896B (en])

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692960A (en) * 1994-05-31 1997-12-02 Ntn Corporation Homokinetic joint having balls with axial play in cage pockets and interference fits between inner and outer rings
US6431988B1 (en) * 1999-09-17 2002-08-13 Ntn Corporation Fixed type constant velocity joint and assembling method therefor
US20060205522A1 (en) * 2005-03-09 2006-09-14 Jtekt Corporation Constant velocity universal joint

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2065990A1 (en) * 1991-06-28 1992-12-29 Donald Dorsey Williams Touch panel display
JPH06150078A (ja) * 1992-11-13 1994-05-31 Pfu Ltd 非接触型ｉｃメモリカードシステム
SE503483C2 (sv) * 1994-11-29 1996-06-24 Scandrive Hallstahammar Ab Excenterväxel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427237A (en) * 1943-05-26 1947-09-09 Suczek Robert Universal joint
US2845311A (en) * 1954-04-26 1958-07-29 Gen Motors Corp Antifriction bearing
US3802753A (en) * 1971-11-24 1974-04-09 Nasa Hollow rolling element bearings
US4150905A (en) * 1977-02-09 1979-04-24 Ultramet Spheres obtained by vapor deposition for use in ball point pens
US4293171A (en) * 1978-10-25 1981-10-06 Koyo Seiko Company Limited Anti-friction bearing
US4508396A (en) * 1981-05-22 1985-04-02 Hitachi, Ltd. Method of producing bearing component

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1238728B (de) * 1963-10-26 1967-04-13 Demag Ag Homokinetische axial- und winkelbewegliche Kupplung
US3522714A (en) * 1968-06-11 1970-08-04 Ernest Wildhaber Universal joint
DE2209232A1 (de) * 1972-02-26 1973-08-30 Willi Zeidler Formschluessige verbindung durch kugeln, insbesondere zur axialen und kardanisch beweglichen wellenkupplung
EP0015154A1 (en) * 1979-02-23 1980-09-03 The Torrington Company Limited Method of producing bearing cups by deep drawing
DE3020193A1 (de) * 1980-05-28 1981-12-03 Löhr & Bromkamp GmbH, 6050 Offenbach Gleichlaufdrehgelenk
JPS60208626A (ja) * 1984-03-30 1985-10-21 Koyo Seiko Co Ltd 腐食環境下で使用する回転部材支持装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427237A (en) * 1943-05-26 1947-09-09 Suczek Robert Universal joint
US2845311A (en) * 1954-04-26 1958-07-29 Gen Motors Corp Antifriction bearing
US3802753A (en) * 1971-11-24 1974-04-09 Nasa Hollow rolling element bearings
US4150905A (en) * 1977-02-09 1979-04-24 Ultramet Spheres obtained by vapor deposition for use in ball point pens
US4293171A (en) * 1978-10-25 1981-10-06 Koyo Seiko Company Limited Anti-friction bearing
US4508396A (en) * 1981-05-22 1985-04-02 Hitachi, Ltd. Method of producing bearing component

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692960A (en) * 1994-05-31 1997-12-02 Ntn Corporation Homokinetic joint having balls with axial play in cage pockets and interference fits between inner and outer rings
US6431988B1 (en) * 1999-09-17 2002-08-13 Ntn Corporation Fixed type constant velocity joint and assembling method therefor
US20060205522A1 (en) * 2005-03-09 2006-09-14 Jtekt Corporation Constant velocity universal joint
US7520815B2 (en) * 2005-03-09 2009-04-21 Jtekt Corporation Constant velocity universal joint

Also Published As

Publication number Publication date
DE3661378D1 (en) 1989-01-12
SE446896B (sv) 1986-10-13
JPH0242131B2 (en]) 1990-09-20
SE8500869L (sv) 1986-08-23
SE8500869D0 (sv) 1985-02-22
JPS61192930A (ja) 1986-08-27
EP0196403A1 (en) 1986-10-08
EP0196403B1 (en) 1988-12-07

Similar Documents

Publication Publication Date Title
EP1264114B1 (en) Constant velocity joint having fixed centre and crossed grooves
US5122096A (en) Constant velocity ratio universal joint
US6299543B1 (en) Plunging type constant velocity joint
GB2339465A (en) Drive assembly
US4881923A (en) Telescopic transmission joint, in particular for a vehicle
EP0790425B1 (en) Constant velocity universal joint
GB2096738A (en) Universal joints
US6033311A (en) Constant velocity ratio universal joint of the tripode type
US4689035A (en) Homokinetic very freely sliding joint in particular for operating at high speed
US4768990A (en) Telescopic tripot universal joint with bearing rollers
US5692960A (en) Homokinetic joint having balls with axial play in cage pockets and interference fits between inner and outer rings
US4673375A (en) Friction coating for contacting elements of a constant velocity joint
US6280336B1 (en) Compact axle hub unit
US3633382A (en) Universal joint
US7704149B2 (en) Fixed type constant velocity joint
US5728004A (en) Universal joint with layered bushings
US4768994A (en) Telescopic tripot universal joint
JP4191878B2 (ja) 等速ジョイント用スプラインシャフトの嵌合構造
EP0244064B1 (en) Telescopic tripot universal joint
US4685897A (en) Universal joint for tilt steering wheel
US4010625A (en) Sliding homokinetic joint
US5314380A (en) Structure of universal joint
US2891392A (en) Universal joint
US4425101A (en) Angularly movable universal joint
US8162764B2 (en) Constant velocity universal joint

Legal Events

Date Code Title Description
AS Assignment

Owner name: SKF NOVA AB, S-415 50 GOTEBORG, SWEDEN, A CORP OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ADOLFSSON, RUNE;REEL/FRAME:004528/0179

Effective date: 19851216

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19950621

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362